Cross-shell excitations in {sup 30}Al and {sup 30}Si at high spin
Yrast and near-yrast states in {sup 30}Al and {sup 30}Si have been populated to high spin with the {sup 18}O + {sup 14}C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J {approx} 9 {h_bar} at 9.4 and 15.5 MeV, respectively. Their d...
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| Veröffentlicht in: | Nuclear physics. A 2010-12, Vol.847 (3-4) |
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| creator | Steppenbeck, D. Deacon, A. N. Freeman, S. J. Janssens, R. V .F. Carpenter, M. P. Hoffman, C. R. Kay, B. P. Lauritsen, T. Lister, C. J. O'Donnell, D. Ollier, J. Seweryniak, D. Smith, J. F. Spohr, K.-M. Tabor, S. L. Tripathi, V. Wady, P. T. Zhu, S. |
| description | Yrast and near-yrast states in {sup 30}Al and {sup 30}Si have been populated to high spin with the {sup 18}O + {sup 14}C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J {approx} 9 {h_bar} at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the 0f7/2 orbital play a significant role at high spin. |
| doi_str_mv | 10.1016/j.nuclphysa.2010.07.010 |
| format | Article |
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Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. 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| source | Elsevier ScienceDirect Journals |
| subjects | DECAY ENERGY LEVELS NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEAR REACTIONS SPIN |
| title | Cross-shell excitations in {sup 30}Al and {sup 30}Si at high spin |
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